Cynthia Eid IS the AS guru, so I hesitate to add to her comments.
However (famous last word!), I will share what has worked well for
me when soldering 14KY to AS.
(NOTE: although I follow the same procedure with standard sterling,
I can’t claim the same success rate.)
I always file a flat spot on the gold piece so that it has good
contact with the AS. Then I put Battern’s flux on the joint between
AS and gold. Next I “tin” that filed area on the gold with AS solder.
Lastly, warm the flux so that it froths up and then settles down,
leaving a whitish film on the AS side of the joint. Place the
"tinned" side on the flux film (on the AS), and heat until the solder
flows. Focus the heat on the AS part of the joint - less heat on the
We know that hot AS is brittle, but the gold can stand some
manipulation if necessary. Using this procedure, I have not had any
problems with the gold sinking into the AS… however, I really
watch the solder and remove the torch immediately upon flow. Perhaps
our metallurgically gifted members can explain why AS is more
forgiving than standard sterling in this regard. I’d like to think
I’ve just gotten REALLY good at soldering gold to silver, but somehow
I suspect there’s more than skill to my success!!
Judy in Kansas, where paradise continues with frequent rains and
moderate temps. THIS CANNOT be Kansas in July! Oh yes, finally have
tomatoes ripening - YUM.